The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2019
Filed:
Dec. 10, 2013
Nec Energy Devices, Ltd., Sagamihara-shi, Kanagawa, JP;
Tetsuya Sato, Kanagawa, JP;
NEC ENERGY DEVICES, LTD., Sagamihara-shi, Kanagawa, JP;
Abstract
An object of the present invention is to provide a high-quality secondary battery having high electric characteristics and high reliability, the secondary battery preventing a shortcut between a positive electrode and a negative electrode by means of an insulating material and preventing or reducing an increase in volume and deformation of a battery electrode assembly, and a method for manufacturing the same. Secondary batteryaccording to the present invention includes a battery electrode assembly including positive electrodeand negative electrodealternately stacked via separator. Positive electrodeand negative electrodeeach includes current collectororand active materialorapplied to current collectoror. Active materialA positioned on one surface of positive electrodeof current collectorincludes flat partAand small-thickness part (thin-layer part)Apositioned on the end portion side relative to flat partA, the small-thickness partAhaving a thickness that is smaller than that of flat partA. A part of active materialB positioned on another surface of current collectorof positive electrode, the part facing thin-layer partAof active materialA positioned on the one surface via current collectoris a flat part having a constant thickness.